<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
           <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!-- 卡片视图 -->
      <el-card>
          <!-- 添加角色按钮区 -->
      <el-row>
          <el-col>
           <el-button type="primary">添加角色</el-button>
          </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
          <!-- 展开列，用于展开具体权限 -->
          <el-table-column type="expand">
              <template slot-scope="scope">
                  <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                      <!-- 渲染一级权限 -->
                      <el-col :span="5">
                          <el-tag  closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                          <i class="el-icon-caret-right"></i>
                      </el-col>
                      <!-- 渲染二级和三级权限 -->
                      <el-col :span="19">
                          <!-- 通过for循环嵌套渲染二级权限 -->
                          <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                              <el-col :span="6">
                                  <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                  <i class="el-icon-caret-right"></i>
                              </el-col>
                              <el-col :span="18">           
                              <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                              </el-col>
                          </el-row>
                      </el-col>
                  </el-row>
                  
              </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
              <template slot-scope="scope" >
                  <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                  <el-button size="mini" type="danger"  icon="el-icon-delete">删除</el-button>
                  <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
              </template>
          </el-table-column>
      </el-table>
      </el-card>
      <!-- 分配权限对话框 -->
      <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
     width="50%"
     @close="setRightDialogClosed"
     >
     <!-- 树型控件 -->
     <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
      <el-button @click="setRightDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
      </el-dialog>
    </div>
</template>

<style lang="less" scoped>
.el-tag{
    margin:7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
      border-bottom:1px solid #eeeeee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>

<script>
export default {
    data(){
        return {
            //所有角色的列表数据
            roleList:[],
            setRightDialogVisible:false,//控制权限分配对话框的隐藏显示,
            rightsList:[],
            //树型控件的绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点的ID值数组
            defkeys:[],
            //当前即将分配权限的ID
            roleId:''
        }
    },
    created(){
            this.getRoleList()
        },
        methods:{
            //获取所有角色的列表
   async getRoleList(){
        const {data:res}=await this.$http.get('roles')
         if(res.meta.status!=200){
             return this.$message.console.error('获取列表失败');
         }
     this.roleList = res.data
     console.log(this.roleList)
  } ,
  //根据id删除对应权限
 async removeRightById(role,rightId){
          //弹框提示用户是否删除
       const  confirmResult =  await  this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(confirmResult!='confirm'){
            return this.$message.info('取消删除')
        }
    const {data:res} = await  this.$http.delete(`roles/${role.id}/rights/${rightId}`)
    if(res.meta.status!=200){
        return this.$message.error('删除权限失败')
    }
        this.$message.success('删除权限成功')

        role.children = res.data;//不使用this.getroleList()是因为这样会把整个表格渲染一遍，这里只需要局部更新就行
  },
  //展开分配权限的对话框
  async showSetRightDialog(role){
       this.roleId = role.id;
      //在显示对话框之前获取权限的数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status!=200){
        return  this.$message.error('获取权限数据失败')
      }
      //把获取到的数据赋值到list
      this.rightsList = res.data;
      console.log(this.rightsList)
      //递归获取三级节点的id
      this.getLeafKey(role,this.defkeys);
      this.setRightDialogVisible = true;

  },
  //通过递归的方式获取角色下所有的三级权限的ID，并保存到defkey中
  getLeafKey(node,arr){
      if(!node.children){
          //如果当前节点不包含children属性，则是三级节点
          return arr.push(node.id)
      }
     node.children.forEach(item =>{this.getLeafKey(item,arr)

     })
          
      },
      //监听分配权限对话框的关闭事件，数组defkeys不清空的话就会重复上面的权限
      setRightDialogClosed(){
           this.defkeys=[];
      },
      //点击为角色分配权限
     async allotRights(){
             const keys = [
                 ...this.$refs.treeRef.getCheckedKeys(),
                 ...this.$refs.treeRef.getHalfCheckedKeys()
             ];
             console.log(keys);
             const idStr = keys.join(',')
     const {data:res}  =  await  this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
         if(res.meta.status!=200){
             return this.$message.error('分配权限失败')
         }
         this.$message.success('分配权限成功')
         this.getRoleList();
         this.setRightDialogVisible =false;
      }
  }

         }

</script>